WO2003000709A2 - Inhibiteurs de siglec - Google Patents

Inhibiteurs de siglec Download PDF

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Publication number
WO2003000709A2
WO2003000709A2 PCT/EP2002/006277 EP0206277W WO03000709A2 WO 2003000709 A2 WO2003000709 A2 WO 2003000709A2 EP 0206277 W EP0206277 W EP 0206277W WO 03000709 A2 WO03000709 A2 WO 03000709A2
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group
siglec
inhibitor according
atom
derivative
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PCT/EP2002/006277
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German (de)
English (en)
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WO2003000709A3 (fr
WO2003000709A9 (fr
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Sorge Kelm
Reinhard Brossmer
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Sorge Kelm
Reinhard Brossmer
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Priority claimed from DE2001129332 external-priority patent/DE10129332A1/de
Application filed by Sorge Kelm, Reinhard Brossmer filed Critical Sorge Kelm
Priority to US10/481,529 priority Critical patent/US7820714B2/en
Priority to KR10-2003-7016631A priority patent/KR20040040408A/ko
Priority to EP02748751A priority patent/EP1397374A2/fr
Priority to JP2003507112A priority patent/JP2004534085A/ja
Priority to CA2451051A priority patent/CA2451051C/fr
Priority to AU2002319207A priority patent/AU2002319207B2/en
Publication of WO2003000709A2 publication Critical patent/WO2003000709A2/fr
Publication of WO2003000709A9 publication Critical patent/WO2003000709A9/fr
Publication of WO2003000709A3 publication Critical patent/WO2003000709A3/fr

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
    • C07H15/00—Compounds containing hydrocarbon or substituted hydrocarbon radicals directly attached to hetero atoms of saccharide radicals
    • C07H15/02—Acyclic radicals, not substituted by cyclic structures
    • C07H15/04—Acyclic radicals, not substituted by cyclic structures attached to an oxygen atom of the saccharide radical
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/70—Carbohydrates; Sugars; Derivatives thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
    • A61P31/12—Antivirals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00—Antineoplastic agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P37/00—Drugs for immunological or allergic disorders
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P37/00—Drugs for immunological or allergic disorders
    • A61P37/02—Immunomodulators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P37/00—Drugs for immunological or allergic disorders
    • A61P37/08—Antiallergic agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
    • C07H7/00—Compounds containing non-saccharide radicals linked to saccharide radicals by a carbon-to-carbon bond
    • C07H7/02—Acyclic radicals
    • C07H7/027—Keto-aldonic acids

Definitions

  • the invention relates to Siglec inhibitors and pharmaceutical compositions containing them. Furthermore, the invention relates to methods for increasing the binding selectivity of Siglec inhibitors and specifying medical indications of the Siglec inhibitors provided.
  • Siglecs are Ig-type lectins which are characterized by an N-terminal V-Set domain which mediates sialic acid binding. The Ig domain is followed by a different number of Ig domains from the C2 set.
  • the lectin family was originally based on independent studies of sialoadhesin (Siglec-1 CD 169), a macrophage lectin-like adhesion molecule, and CD22 (Siglec-2), a B-cell restricted member of the Ig superfamily (IgSF), that plays an important role in regulating B cell activation. It has also been found that both molecules mediate cell-cell interactions in vitro by recognizing sialylated glycoconjugates.
  • Table 1 gives an overview of the occurrence and the potential functions of the Siglecs described so far. Table 1: Occurrence and potential functions of the Siglecs described so far
  • Sialoadhesin (Sn, Siglec-1) macrophage subpopular cells cellular interactions of macrophages
  • CD22 (Siglec-2) B lymphocyte modulation of the B cell dependent immune response; Homing in bone marrow
  • CD33 (Siglec-4) myeloid progenitor cells unknown
  • Myelin-associated glycoprotein (MAG, Siglec- myelinating cells of the central and preserving the myelin structure and function; 4a); Schwann cells myelin protein (SMP, peripheral nervous system (oligodendrocyte regulation of neurite growth Siglec-4b) and Schwann cells)
  • OB-BP2 neutrophil granulocytes, monocytes unknown; presumably signal transduction
  • OB-BP1 Siglec-6 placenta (cytotoxic and syncytiotrophoblasts); Sia-independent high affinity leptin binding; B-lymphocyte function of Sia binding unknown p75 / AIRMl (Siglec-7) natural killer cells inhibitory receptor of natural killer cells
  • the interactions mediated by Siglecs can be of two types.
  • signals in the cells that express the corresponding Siglec can be generated by binding the Siglec molecules (eg attenuation of the B-cell-dependent immune response, inhibition of the cytotoxic activity of natural killer cells (NK cells) by phosphorylation of ITIM motifs), or signals can be generated in the cell bound over the Siglec (eg regulation of the neurite growth of neurons by Siglec-4a, [MAG)] (1, 2).
  • the Siglecs' binding partners can work in two ways (3).
  • monovalent substances can prevent the biologically relevant cross-linking of the Siglec molecules with one another or with other molecules. This would lead to a lowering of the signal.
  • polyvalent substances can amplify the triggered signal. Regulation in both directions is thus possible. Suitable specific substances are required for these processes.
  • Sialic acid is a generic name for a large family of 9-carbon atom sugars, which are all derivatives of neuraminic acid (new) or keto-deoxy-nonulosonic acid (KDN). Typically, these are located on the exposed non-reducing ends of the oligosaccharide chains, which are linked to a large number of proteins and lipids.
  • the sialic acid binding site of the Siglecs lies in the N-terminal domain, which is a V-Set domain, and which contains structural features which are characteristic of Siglecs.
  • the position of the binding site and the amino acids involved in the binding were determined by X-ray structure analysis of cocrystals of Siglec-1 (sialoadhesin) and 2,3-sialyl lactose (4).
  • the contributions of the functional groups of sialic acid to the binding were determined from hapten inhibition experiments with synthetic sialic acid derivatives (5,6). In summary, these studies have shown that, among other things, the hydroxyl group at C-9 of sialic acid makes a significant contribution as water material donor in a hydrogen bond and can be replaced by an amino group (5).
  • binding partners are required which occupy the binding sites with high affinity.
  • the object of the present invention is therefore to provide Siglec inhibitors with increased affinity.
  • a preferred task is to provide Siglec inhibitors with increased affinity that bind as specifically as possible to individual Siglec receptors.
  • X represents a negatively charged group such as a carboxy, phosphate or sulfate group, or a derivative thereof;
  • Y represents an H atom, an alkyl or aryl group, a hydroxy group, a glycan, a polymeric carrier molecule, or a derivative thereof;
  • Z is selected from O, N, C and S.
  • R1 represents an H atom, a hydroxyl group, or a derivative thereof
  • R2 represents a hydroxy or amino group, or a derivative thereof
  • R3 represents a hydroxy group or a derivative thereof
  • R4 represents a hydroxy group or a derivative thereof
  • R5 denotes a substituted or unsubstituted amino group, the substituent being selected from
  • R4 act as an H acceptor and R5 as an H donor
  • R6 represents an H atom or an alkyl group, a charged group, or a derivative thereof
  • R6 ' represents an H atom or an alkyl group, a charged group or a derivative thereof, at least one substituent being selected from R6 and R6' is a hydrophobic group, preferably an H atom or a methyl group;
  • R7 represents an H atom or any group, preferably a group for improving the pharmacological properties of the Siglec inhibitor.
  • Siglec encompasses all Siglec molecules.
  • Siglec-1 to Siglec-10 can be found, for example, in the references listed in (1, Table 1).
  • the amino acid sequence of Siclec-11 can be found in (7).
  • the amino acid sequences of the Siglec molecules are also available from the publicly accessible Entrez database (Internet address: www.ncbi.nim.nih.gov./intrez).
  • the Siglec molecules can naturally occur in their natural environment. cells or in artificial environments.
  • Siglec inhibitor generally means the ability of a compound to inhibit a sialic acid molecule, particularly the natural ligand, from binding to the Siglec protein. Depending on its structure, a Siglec inhibitor according to the invention can activate or inactivate a given Siglec protein.
  • the reference compound of sialic acid is preferably methyl- ⁇ -5'-N-acetyl-neuraminic acid. The inhibition can preferably be determined by a hapten inhibition test.
  • the hapten inhibition test is based on the fact that Fc chimeras, which consist of N-terminal domains from Siglecs and the Fc part of human IgG, complex with radioactively labeled anti-Fc antibodies and incubate with different concentrations of the potential inhibitors to be investigated are added before suitable target cells, preferably human erythrocytes, are added. After incubation at 4 ° C., the unbound complexes are removed by washing the cells and the bound radioactivity is determined. From the data obtained in this way, the concentrations are determined which lead to 50% inhibition of binding (IC50 values) (5.6).
  • 10 .mu.l of the complex solution with an activity of 10 3 Bq 125 l are particularly preferably mixed with the same volume of a solution of the substance to be examined (triple concentration) and incubated at 4 ° C. for 1 hour.
  • 10 ⁇ l of a suspension of target cells, preferably 0.25 to 0.5% of human erythrocytes, are added and an incubation is carried out at 4 ° C.
  • the unbound radioactivity is removed by washing the cells five times with 200 ⁇ l washing buffer, preferably phosphate-buffered saline with 0.1% (WV) bovine serum albumin, and the cell-bound activity is determined using a ⁇ counter.
  • the binding of sialidase-treated cells and of untreated cells without the substance to be examined is preferably measured.
  • the inhibition is determined by setting the value without inhibitor to 0% and that with sialidase-treated cells to 100%.
  • the term “derivative” generally means with respect to the residues X, Y, R1-R4 that the group occurring in neuraminic acid is replaced by a bioisosteric group which has essentially the same biological activity.
  • the concept of bioisosterie is known to the person skilled in the art.
  • the term "a substituted formyl, alkanoyl, cycloalkanoyl, aryl-carbonyl, heteroaryl-carbonyl, alkyl, cycloalkyl or heteroaryl group” means that the groups in question have substituents which have essentially the same biological properties leave. These include, for example, lower alkyl substituents such as methyl, ethyl, propyl, butyl groups.
  • X means a negatively charged group. This negatively charged group presumably forms a salt bridge with an arginine residue of the Siglec receptor.
  • the naturally occurring substituent is a carboxy group. Suitable derivatives thereof are, for example, a phosphate or sulfate group. Phosphonate and sulfonate groups are also considered. Other suitable derivatives are a carboxymethylene or a carboxyethylene group.
  • Y denotes an H atom, an alkyl or aryl group, a hydroxyl group, a glycan, a polymeric carrier molecule, or a derivative thereof.
  • the naturally occurring substituent is a hydroxy group.
  • Suitable derivatives of the hydroxy group are an amino or thio group.
  • Suitable glycans are hexoses, hexosamines and / or pentoses or derivatives thereof, preferably glucose or galactose or derivatives thereof.
  • Other suitable glycans are oligo- and polysouharides, it being possible for the oligo- and polysouharides to be composed of one monomer or different monomers (mixed sugars).
  • Carrier molecules which improve the pharmacological properties, such as a longer residence time, are suitable as polymeric carrier molecules.
  • Polymeric carrier molecules with several bound Siglec inhibitor ligands enable cross-linking and thus activation of the Siglec receptor molecules. The use of such polymeric carrier molecules therefore enables fine regulation.
  • the carrier molecules preferably contain a core and different amounts of substances according to the invention which are bound to them via suitable spacers.
  • the desired pharmacological effect can be controlled via the composition of the polymers comprising core and substances according to the invention.
  • the polymers (core) are preferably dendrimers, polyacrylamide or polylactide.
  • the substances according to the invention can e.g. B. either chemically or enzymatically the polymers are coupled.
  • Z means an atom selected from O, N, C or S.
  • R1 denotes an H atom, a hydroxyl group, or a derivative thereof. Suitable derivatives of the hydroxyl group are an amino or thio group, which can optionally be substituted.
  • R2 denotes a hydroxyl or amino group, or a derivative thereof.
  • the naturally occurring substituent is an amino acetyl group.
  • Suitable derivatives are, for example, those in which the amino group is substituted by an acetyl, propionyl, butyl or pentyl group.
  • the alkanoyl group can also be substituted by one or more halogen atoms. Further suitable derivatives can be found (reference 5; compounds 4 to 12).
  • the modification at position R2 can contribute to an increase in the specificity of the Siglec inhibitor for a given Siglec molecule.
  • R3 denotes a hydroxyl group or a derivative thereof. Suitable derivatives are, for example, an amino or thio group, which can optionally be substituted.
  • R4 means a hydroxyl group or a derivative thereof.
  • Suitable derivatives are groups that act as H acceptors.
  • Exemplary derivatives here are an amino or thio group, which can optionally be substituted, the H-acceptor property being retained.
  • R6 and R6 'independently of one another represent an H atom or an alkyl group, a charged group, or a derivative thereof, at least one substituent selected from R6 and R6' being a hydrophobic group, preferably an H atom or a methyl Group, is.
  • Suitable derivatives are lower alkyl substituents such as a methyl, ethyl, propyl or butyl group.
  • Suitable charged groups are, for example, carboxy, sulfate or phosphate groups.
  • R7 denotes an H atom or any group, preferably a group for improving the pharmacological properties of the Siglec inhibitor. Groups for improving the pharmacological properties can be polymeric carrier molecules.
  • the entire Siglec inhibitor should preferably have a hydrophilicity which leads to a uniform distribution of the inhibitor in a hydrophilic and hydrophobic phase.
  • Siglec inhibitors which specifically bind to certain Siglec proteins and inhibit them.
  • the alkanoyl group is selected from an ethanoyl, propanoyl, butanoyl, pentanoyl, hexanoyl, heptanoyl, octanoyl, nonanoyl and decanoyl group, preferably hexanoyl.
  • branched alkanoyl groups are also considered.
  • the cycloalkanoyl group selected from a C 3 to C 6 cycloalkanoyl group is preferably cyclohexanoyl.
  • the aryl-carbonyl group is selected from a C 4 to C 15 aryl-carbonyl group, preferably from a benzoyl group, naphthoyl group, anthracene-carbonyl group, this radical being decisive in the selectivity is involved.
  • the selectivity can hereby be controlled by suitable selection.
  • the heteroaryl carbonyl group is selected from a pyridyl carbonyl group, quinaldine carbonyl and thiophenyl carbonyl group.
  • the alkyl group is selected from a C to C 20 alkyl group, preferably a methyl, ethyl, propyl, butyl, pentyl and hexyl group.
  • branched alkyl groups are also considered.
  • the cycloalkyl group is selected from a C 3 -C 6 alkyl group.
  • the aryl group is selected from a phenyl, naphthyl, biphenyl and anthracene group.
  • the aryl group can be selected from both condensed and uncondensed aryl groups.
  • the heteroaryl group is furthermore preferably selected from a pyridyl, quinaldine and thiophenyl group.
  • the heteroaryl group comprises both condensed and non-condensed heteroaromatic systems which are known to the person skilled in the art.
  • a particularly preferred compound is methyl- ⁇ -9-N- (naphthyl-2-carbonyl) -amino-9-deoxy-Neu5Ac.
  • This sialic acid derivative binds about 12 times more strongly to Siglec-1 than the reference compound 2-alpha-methyl-5-N-acetyl-neuraminic acid, even more strongly to Siglec-4a (about 236 times more).
  • Methyl- ⁇ -9-N- (biphenyl-4-carbonyl) -amino-9-deoxy-Neu ⁇ Ac is also particularly preferred. This compound binds to Siglec-2 approximately 150 times more than the reference compound 2-alpha-methyl-5-N-acetyl-neuraminic acid.
  • Methyl- ⁇ -9-N-benzoyl-amino-9-deoxy-Neu5Ac is furthermore particularly preferred.
  • This compound binds approximately 704 times more strongly to Siglec-4a (MAG) than the reference compound 2-alpha-methyl-5-N-acetyl-neuraminic acid.
  • a Siglec inhibitor is provided, wherein
  • X represents a carboxy group which should be in the axial position
  • Y is an H atom, an O-methyl, O-benzyl group or a derivative of one
  • Z represents an O atom
  • R1 represents a hydroxy group
  • R2 represents an aminoacetyl group
  • R3 represents a hydroxy group
  • R4 represents a hydroxy group
  • R6 represents an H atom
  • R6 ' represents an H atom
  • R7 represents an H atom.
  • the invention further provides a method for producing Siglec inhibitors with increased affinity for a Siglec molecule, which comprises the steps:
  • Siglec inhibitors with increased affinity for a Siglec molecule by introducing a hydrophobic substituent in position R5 of the Neuraminic acid or derivatives thereof can be obtained.
  • the affinity of the product for a given Siglec molecule can be determined by a binding assay or a hapten inhibitone assay.
  • the conditions for the hapten inhibition assay are as stated above, preferably as specified in (5, 6).
  • the affinity of the selected products for a given Siglec molecule can be further increased by introducing substituents in positions other than position R5, preferably position R2. Suitable substituents for R2 are the substituents specified for R5.
  • the invention further provides a method for increasing the binding selectivity of Siglec inhibitors, which comprises the step of introducing a substituent selected from the radicals for R5 according to one of claims 1 to 10 in position R5 of neuraminic acid or derivatives thereof.
  • 5-N-acetyl-neuraminic acid is preferably used as the starting product, from which the corresponding alkyl, aryl, alkyl-alpha-O or alpha-S-glycosides are first prepared in a multistage reaction sequence.
  • the next step consists in replacing the hydroxyl group at C9 (R5 according to the present invention) of the corresponding O- or S-glycoside of 5-N-acetyl-neuraminic acid by an amino group.
  • This transformation can be carried out via the corresponding 9-O-tosyl connection.
  • This reaction can preferably be carried out using a modified Mitsunobu reaction.
  • alkyl, aryl, aralkyl-alpha-O or alpha-S-glycosides of 9-amino-9-deoxy-5-N-acetyl-neuraminic acid thus obtained finally provide the corresponding alkyl, aryl, alkyl alpha-O- or alpha-S-glycosides of 5-N-acetyl-9- (biphenyl-4-carbonyl) -amino-9-deoxy-neuraminic acid and similar substances with varying acyl residues at C-9 (R5 according to present invention) permanent amino group.
  • This linkage of acid function with amino group can be carried out in different ways, for example using the corresponding acid chloride or anhydride or using the carbodiimide method or using the method of the corresponding one, for example using nitrophe nol, pentafluorophenol, etc. activated acid function.
  • the present invention further provides pharmaceutical compositions comprising at least one Siglec inhibitor according to the invention and a pharmaceutically acceptable carrier.
  • the therapeutically usable Siglec inhibitors are as selective as possible for a Siglec molecule.
  • Pharmaceutically acceptable carriers are known to the person skilled in the art. Suitable diluents are also included.
  • any type of administration is generally, for. B. intravenously, intraperitoneally, subcutaneously, intradermally, orally or topically. Oral administration is preferred.
  • the amount of drug to be administered can be routinely determined by the doctor.
  • the present invention provides the use of the Siglec inhibitors according to the invention for the treatment of Siglec-mediated diseases, preferably diseases of the immune system.
  • Siglec-2 is involved in the regulation of the B cell-dependent immune response.
  • the present invention thus specifies the use of the Siglec inhibitors for regulating the B cell-dependent immune response.
  • u. a. Allergies, autoimmune diseases and chronic inflammation are indicated as targets for Siglec inhibitor treatment.
  • Siglec-4a has a neurite growth inhibitory effect.
  • the Siglec inhibitors according to the invention are thus suitable for abolishing the neurite growth-inhibiting action of Siglec-4a and therefore have the ability to improve the regenerative capacity of injured nerves, for example in the treatment of paraplegia.
  • Siglec-7 is involved in the regulation of the cytotoxic activity of NK cells.
  • the sialic acid derivatives according to the invention are therefore suitable for regulating the cytotoxic activity of these cells.
  • treatable diseases are, for example, cancer diseases and viral diseases, in particular AIDS.
  • Siglecs inhibitors according to the invention are therefore also suitable for controlling the immune system.
  • the preferred Siglec inhibitors according to the invention result in an increased B-cell-dependent immune response, which can be demonstrated in particular by an increased Ca 2+ release.
  • This increased Ca 2+ release results from the use of the preferred Siglec inhibitors according to the invention, demonstrably, for example, in experiments with Daudi cells or B cells from mice.
  • This increased B-cell dependent immune response induced by the use of the preferred Siglec inhibitors of the present invention, opens up promising opportunities for the manufacture of medicaments for the treatment of diseases associated with immune defects.
  • a preferred compound in this connection is methyl- ⁇ -9-N- (biphenyl-4-carbonoyl) amino-9-deoxy-Neu5Ac (shown in the examples). This compound in particular also shows a very remarkable selective affinity for hCD22.
  • CVID Common Variable Immunodeficiency
  • IgA deficiency the "Common Variable Immunodeficiency”
  • the CVID patients have B cells, which cannot initiate a good immune response and are characterized by hypogam maglobulinemia. They suffer from severe infectious diseases and can currently only are treated with immunoglobulins, which is a problematic therapy due to the considerable risks and limited replaceability.Patients with IgA deficiency could also be treated with immunoglobulins, but this is often avoided due to the risks described above, also because these patients are often only minor Show symptoms.
  • Methyl- ⁇ -5-N-acetyl-9-amino-9-deoxy-neuraminic acid acylated substances here is the synthesis of methyl- ⁇ -5-N-acetyl-9-N- (biphenyl-4-carbonyl) -amino- 9-deoxy-neuraminic acid (3).
  • the 9-azido compound (1) is hydrogenated with palladium oxide in H 2 0 at atmospheric pressure.
  • Methyl- ⁇ -5-N-acetyl-9-amino-9-deoxy-neuraminic acid (2) (30 mg) dissolved in dried DMF (0.6 ml) react smoothly with the in the presence of triethylamine (12.9 ml) the above-mentioned nitrophenyl ester (39 mg) at RT.
  • the purification is carried out by chromatography on silica gel (flash method).
  • the hapten inhibition assay is carried out under the conditions given in (5,6).
  • Siglec-4a (MAG) Siglec-1 (sialoadhesin) Siglec-2 (human CD22) Siglec-2 (muri ⁇ e CD22)
  • Siglec-4a (MAG Siglec-1 (sialoadhesin) Siglec-2 (human CD22) Siglec-2 (murine CD22) structure IC50 rIP IC50 rIP IC50 rIP IC50 rIP IC50 rIP
  • the IC50 value is the Siglec inhibitor concentration which leads to 50% inhibition of binding in the hapten inhibition assay.
  • the rIP value of each sialic acid derivative was determined by forming the quotient of the IC50 value of the comparison compound 5-N-acetyl-neuraminic acid and the IC50 value of the compound to be investigated. Sialic acid derivatives with an rIP value of> 1.0 therefore bind better than the reference compound and an rIP value of ⁇ 1 shows that the compound binds poorly to the receptor than the reference compound, n.d. means that the determination was not carried out.
  • the compound BPC-Neu5Ac (shown below) was used in a series of experiments to study selectivity and activity in accordance with known methods. Stimulation of Daudi cells with anti-IgM in the presence of BPC-Neu5Ac resulted in an increase in the Ca 2+ concentration. The use of this compound also resulted in a clearly increased Ca 2+ concentration in anti-IgM stimulated primary B lymphocytes from human blood. These data suggest that the increased Ca + signal of the treated cells is caused by a specific inhibition of the ligand binding domain of CD22. This impairment in ligand binding leads to incomplete activation of the intracellular inhibitor domain of CD22.

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Abstract

L'invention concerne des inhibiteurs de Siglec présentant une affinité accrue pour la molécule réceptrice. De préférence, ces inhibiteurs de Siglec agissent de manière sélective sur une molécule de Siglec donnée. L'invention concerne en outre des procédés pour produire des inhibiteurs de Siglec et des procédés pour accroître la sélectivité de liaison pour une molécule de Siglec donnée. L'invention concerne également des compositions pharmaceutiques contenant ces inhibiteurs de Siglec. Des indications médicales des inhibiteurs de Siglec sont également décrites.
PCT/EP2002/006277 2001-06-19 2002-06-07 Inhibiteurs de siglec WO2003000709A2 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US10/481,529 US7820714B2 (en) 2001-06-19 2002-06-07 Siglec inhibitors
KR10-2003-7016631A KR20040040408A (ko) 2001-06-19 2002-06-07 시글렉 억제제
EP02748751A EP1397374A2 (fr) 2001-06-19 2002-06-07 Inhibiteurs de siglec
JP2003507112A JP2004534085A (ja) 2001-06-19 2002-06-07 シグレック阻害剤
CA2451051A CA2451051C (fr) 2001-06-19 2002-06-07 Inhibiteurs de siglec
AU2002319207A AU2002319207B2 (en) 2001-06-19 2002-06-07 Sialic acid derivatives for use as siglec inhibitors

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DE10129332.1 2001-06-19
DE2001129332 DE10129332A1 (de) 2001-06-19 2001-06-19 Sialinsäure-Derivate als Siglec-Inhibitoren
DE10216310 2002-04-12
DE10216310.3 2002-04-12

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AU (1) AU2002319207B2 (fr)
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WO2009036754A1 (fr) * 2007-09-21 2009-03-26 Universität Hamburg Inhibiteurs de la glycoprotéine associée à la myéline (mag)
EP2610263A1 (fr) 2011-12-30 2013-07-03 Brossmer, Reinhard Dimères d'acide sialique
WO2013190103A1 (fr) * 2012-06-21 2013-12-27 Reinhard Brossmer Dérivés d'acide sialique
EP2910561A1 (fr) 2014-02-25 2015-08-26 Reinhard Brossmer Dérivés d'acide sialique
US10973922B2 (en) 2013-05-02 2021-04-13 Glykos Finland Oy Glycoprotein-toxic payload conjugates

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WO2007120815A2 (fr) * 2006-04-12 2007-10-25 The Regents Of The University Of California Procedes destines au traitement de troubles lymphocytaires par modulation de l'activite siglec
US9018245B2 (en) 2006-12-26 2015-04-28 Japan Science And Technology Method for promoting immune response comprising inhibiting CD22 function in B cells
EP2625205A2 (fr) * 2010-10-05 2013-08-14 Daiichi Sankyo Company, Limited Anticorps ciblant la protéine associée aux ostéoclastes siglec-15
WO2014098249A1 (fr) * 2012-12-21 2014-06-26 国立大学法人名古屋大学 Composition présentant une activité de réparation tissulaire et son utilisation
CA2918194C (fr) * 2013-03-27 2022-12-06 The General Hospital Corporation Procedes et agents pour le traitement de la maladie d'alzheimer
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CN105017340B (zh) * 2015-08-05 2017-11-14 厦门大学 一种抗原连接的唾液酸及其应用
EP3368575A2 (fr) * 2015-10-29 2018-09-05 Alector LLC Anticorps anti-siglec-9 et leurs procédés d'utilisation
EP3481374A1 (fr) 2016-07-08 2019-05-15 The Scripps Research Institute Désensibilisation de mastocytes par co-présentation d'antigènes avec des ligands de siglec à mastocytes à haute affinité
WO2018098342A1 (fr) * 2016-11-23 2018-05-31 The Regents Of The University Of California Acides sialiques n-acétylés et sialosides apparentés
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007105094A1 (fr) * 2006-03-14 2007-09-20 Universität Basel Procédé d'identification de nouvelles têtes de série pour des médicaments candidats
WO2009036754A1 (fr) * 2007-09-21 2009-03-26 Universität Hamburg Inhibiteurs de la glycoprotéine associée à la myéline (mag)
EP2610263A1 (fr) 2011-12-30 2013-07-03 Brossmer, Reinhard Dimères d'acide sialique
WO2013097942A1 (fr) 2011-12-30 2013-07-04 Reinhard Brossmer Dimères d'acide sialique
WO2013190103A1 (fr) * 2012-06-21 2013-12-27 Reinhard Brossmer Dérivés d'acide sialique
US9539336B2 (en) 2012-06-21 2017-01-10 Reinhard Brossmer Sialic acid derivatives
US10973922B2 (en) 2013-05-02 2021-04-13 Glykos Finland Oy Glycoprotein-toxic payload conjugates
EP2910561A1 (fr) 2014-02-25 2015-08-26 Reinhard Brossmer Dérivés d'acide sialique
US10472381B2 (en) 2014-02-25 2019-11-12 Reinhard Brossmer Sialic acid derivatives

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CN100491389C (zh) 2009-05-27
US20040176309A1 (en) 2004-09-09
WO2003000709A3 (fr) 2003-09-25
EP1397374A2 (fr) 2004-03-17
AU2002319207B2 (en) 2007-03-01
WO2003000709A9 (fr) 2003-04-10
CA2451051A1 (fr) 2003-01-03
CA2451051C (fr) 2012-11-27
US7820714B2 (en) 2010-10-26
CN1656113A (zh) 2005-08-17
JP2004534085A (ja) 2004-11-11

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